Furnace-regulator.



No. 870,028. 7 I PATENTED NOV. 5, 1907.

W. L. HAGER.

FURNACE REGULATOR.

APPLIOATION FILED APR. 4. 1901.

Wlllum Lfidgfl i WITNESSES: I JNI/ENTOR.

//I I' 'I' rfi ' A TTORNE Y5 PATENT OFFICE.

WILLUM LOUIS HAGER, OF LINCOLN, NEBRASKA.

FURNACE-REGULATOR.

Specification of Letters Patent.

Patented Nov. 5, 1907.

Application filed April 4. 1907. Serial No. 366358.

To all whom it may concern:

Be it known that I, WILLUM Louis HAG ER, a citizen of the United States, residing at Lincoln, in the county of Lancaster and State of Nebraska, have invented a new and useful Furnace-Regulator, of which the fol lowing is a specification.

This invention has reference to improvements in furnace regulators, and it is designed to produce a regulator for the draft openings of a furnace that may be easily and quickly set to cause the furnace to furnish any desired degree of heat and maintain it at practically such a point that the heat supplied shall be to all intents and purposes constant.

-The invention consists essentially in providing a connection with the dome of the furnace to utilize its expansion and contraction under the action of heat to operate a connection to the ash-pit draft regulator and to the air valve in the smoke pipe so that these two parts shall be in such relative positions that the requisite degree of heat may be maintained by a proper regulation of the draft to the fire pit.

Theinvention will be fully understood from the following detailed description taken in connection with the accompanying drawings forming part of this specification, in which,

Figure 1. is a side elevation, with parts broken away, of a furnace equipped with a draft regulator constructed in accordance with my invention; and Fig. 2 is a detail view of a portion of the draft regulator with parts removed.

Referring to the drawings, there is shown a furnace 1 which may be of ordinary construction and provided with the ordinary ash-pit door 2 having a flap or valve 3 for the admission of air to a suitable regulating apparatus. The furnace is also provided with the usual smoke pipe 4 having an air inlet valve 5 which may be similar to that provided in ordinary furnaces. The flap 3 of the ash-pit door is connected to a chain 6 passing upward to a sector 7, to be hereinafter described, and thence rearwardly over a pulley 8 fast to the floor 9 above the furnace by means of a hanger 10, and the chain after passing over the pulley 8 is carried downward and connected to the valve 5.

The sector 7 has a groove in its face for the passage of the chain 6 and is pivotally connected at its axis 11 to a hanger 12 fast to a plate 13 secured to the joists 14 to which the floor 9 is nailed. The sector 7 may be graduated, as indicated at 15, along one face adjacent to the periphery. The sector 7 is of the skeleton form having its peripheral portion connected by arms 16 to a hub portion 17, and this -hub portion has a short radial arm 18 project ng from it in line with one of said arms 16. Fast to one of the arms 16 is a curved, slotted plate 19 adjustably secured to said arm by means of a thumb-nut 20, and thiscurved, slotted plate carries a pointer 21 arranged to move over the graduated portion of the sector, and also another pointer 22 fast on the pointer 21 and extending through a slot 23 formed radially through the peripheral portion of the sector 7. The pointer 22 is arranged to pass through the slot 23 and through one of the links of the chain 6 so that the chain and sector may be made to move synchronously ,but the position of the chain with relation to the sector 7 may be adjusted as desired by engaging the pointer 22 through any one of the links of the chain 6. about central thereto is another hanger 24 fast on the plate 13 and connected to the hanger 12 by cross bracerods 25, and this hanger carries a wheel 26 having spokes 27 4 connecting its periphery to a hub 28. One of the spokes 27 is elongated to form an arm 29 extending-radi ally from the wheel26, and this arm 29 carries a weight 30 which may be made adjustable along the arm 29 to counterbalance the rest of the structure. The wheel 26 is connected near its rim by a pitman 31 to the arm 18 on the hub 17 of the sector 7, and the hub 28 of the wheel 26 is connected at a point eccentric to the axis of the wheel by a rod 32 to the dome 33 of the furnace.

Under the influence of the heat of the fire in the furnace the dome 33 will expand and the point connected to the rod 32 will rise. This will cause a corresponding rotation of the wheel 26 on its axis, lifting the arm 29 and weight 30 and pulling the pitman 31 in a direction to cause it to rotate the sector 7 so as to move it in a direction to tend to close the flap 3 and open the air valve 5. As the heat increases the draft flap 3 will be closed more and more toward the ash-pit door 2 and the valve 5 will be opened to a correspondingly greater extent, and this will continue until there is abalance created so that the draft entering at the ash-pit door is so reduced by .the opening of the air valve 5 that the fire is maintained at an approximately constant degree of temperature, and the furnace will therefore furnishits heat at such approximately constant degree. Should from any cause the intensity of the fire decrease and the heat be lowered, the dome 33 will sink and the movement of the parts will be reversed so that the flap 3 is opened to a greater extent and the air valve 5 is correspondingly closed and consequently the draft is increased and the furnace will supply a greater degree of heat until the desired maximum is reached.

By means of the slotted plate 19 with the pointers 21 and 22 the relation of the flap 3 and air valve 5 to the sector 7, and, consequently, to the dome 33 with which this sector maintains a constant relation, may be varied so that a greater or lessrlcgree of heat must be generated in the furnace so as to cause the parts to reach the desired balance. By this means, a less degree of heat in the furnace may cause the dome to act upon the sector 7 to close the draft flap 3 and open the air valve 5 before so high a degree of heat has been reached as was before considered, or the parts may be so adjusted that a still higher degree of heat may be maintained in the furnace Located at a point over the furnacethan was first considered. These various adjutsments, it will be seen, are readily made by the slotted plate 19 and thumb-nut 20.

It will be evident that the operation of this device, when onceadjusted, it entirely automatic but that its point of adjustment may be readily varied to suit various climates or the degree of heat desired, at the Will of the possessor oi the furnace.

1, In a furnace, a dome capable of expansion and contraction under the action of heat, an ashpit, a draft valve for the ashpit, a smoke pipe, an air valve for the smoke pipe, a chain connection between the two valves, a pivoted sector over which the chain passes, said sector having a slot radially therethrough, a connection for fastening the chain to the sector consisting of a pointer adjustably secured to the sector and extending through the slot and a link of the chain, andother connections between the sector and the furnace dome.

2. In a furnace, a dome capable of expansion and contraction under the action of heat, an ashpit, a draft valve for the ash-pit, a smoke pipe, an air valve for the smoke pipe, chain connections between the two valves, a pivoted sector over which the chain passes and to which it is connected, a rotatable member connected to the sector, and connections between said rotatable member and the furnace dome.

3. In a furnace, a dome capable of expansion and contraction under the action of heat, an asphpit, a draft valve for the ash-pit, a smoke pipe, an air valve for the smoke pipe, chain connections between the two valves, :1 pivoted sector over which the chain passes, said sector being pro vided with a radial slot, a pointer extending through said slot and engaging the chain and adjustably connected to said sector, a rotatable counterbalance wheel located over the furnace, a connection between the wheel and the sector, and another connection between the wheel and the dome of the furnace.

In testimony that I claim the foregoing as my own, i have hereto aflixed my signature in the presence 01' two Witnesses \VILLUM LOUIS HAUIGR.

Witnesses Owsnm WiLsoN, Bum. llaonn. 

